How do you approach the work up and surgery for H&N SCC of unknown primary?

CT max, face, neck and chest. PET is ok but has a high false positive rate in the oropharynx where the primary is likely located in the US. Direct laryngoscopy and ipsilateral tonsillectomy. Bilateral tonsillectomy is ok but low yield (less than 5%). Biopsy base of tongue. Lingual tonsillectomy is o...